package collection;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection<Point> c = new ArrayList<>();
//        Collection<Point> c = new HashSet<>();
        c.add(new Point(1, 2));
        c.add(new Point(3, 4));
        c.add(new Point(5, 6));
        c.add(new Point(7, 8));
        c.add(new Point(9, 10));
        boolean b = c.add(new Point(1, 2));
        System.out.println(b);
        System.out.println(c);

        Point p = new Point(1, 2);
        boolean contains = c.contains(p);
        System.out.println(contains);

        boolean remove = c.remove(p);
        System.out.println(remove);
        System.out.println(c);
    }
}
